b3e51c6e-20fd-4e3a-be47-0ed2efcaa0ab eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2021-10-14 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Processed line aerogravity data from the FISS 2016 surveys covering the Filchner and Halley Ice Shelves, and the English Coast (western Palmer Land), West Antarctica (2016/2017) 2021-10-14 creation 2021-10-14 revision 2021-10-14 publication 2021-10-14 released 1.0 https://doi.org/10.5285/b3e51c6e-20fd-4e3a-be47-0ed2efcaa0ab doi GB/NERC/BAS/PDC/01574 https://data.bas.ac.uk/ NE/L013770/1 award Please cite this item as: Becker, D., Jordan, T., Robinson, C., & Corr, H. (2021). Processed line aerogravity data from the FISS 2016 surveys covering the Filchner and Halley Ice Shelves, and the English Coast (western Palmer Land), West Antarctica (2016/2017) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/b3e51c6e-20fd-4e3a-be47-0ed2efcaa0ab Three separate airborne radar surveys were flown during the austral summer of 2016/17 over the Filchner Ice Shelf and Halley Ice Shelf (West Antarctica), and over the outlet glacier flows of the English Coast (western Palmer Land, Antarctic Peninsula) during the Filchner Ice Shelf System (FISS) project. This project was a NERC-funded (grant reference number: NE/L013770/1) collaborative initiative between the British Antarctic Survey, the National Oceanography Centre, the Met Office Hadley Centre, University College London, the University of Exeter, Oxford University, and the Alfred Wenger Institute to investigate how the Filchner Ice Shelf might respond to a warmer world, and what the impact of sea-level rise could be by the middle of this century. The 2016/17 aerogeophysics surveys acquired a total of ~26,000 line km of aerogeophysical data. The FISS survey consisted of 17 survey flights totalling ~16,000 km of radar data over the Support Force, Recovery, Slessor, and Bailey ice streams of the Filchner Ice Shelf. The Halley Ice Shelf survey consisted of ~4,600 km spread over 5 flights and covering the area around the BAS Halley 6 station and the Brunt Ice Shelf. The English Coast survey consisted of ~5,000 km spread over 7 flights departing from the Sky Blu basecamp and linking several outlet glacier flows and the grounding line of the western Palmer Land, including the ENVISAT, CRYOSAT, GRACE, Landsat, Sentinel, ERS, Hall, Nikitin and Lidke ice streams. Our Twin Otter aircraft was equipped with dual-frequency carrier-phase GPS for navigation, radar altimeter for surface mapping, wing-tip magnetometers, an iMAR strapdown gravity system, and a new ice-sounding radar system (PASIN-2). We present here the processed line aerogravity data collected using the iMAR strapdown gravity system mounted in the BAS aerogeophysically equiped Twin Otter aircraft. Data are provided as XYZ ASCII line data. No credit. completed Becker, David Technische Universitaet Darmstadt Researcher author Jordan, Tom British Antarctic Survey Researcher author Robinson, Carl British Antarctic Survey Researcher author Corr, Hugh British Antarctic Survey Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Solid Earth > Geodetics/Gravity > Gravity EARTH SCIENCE > Solid Earth > Geodetics/Gravity theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Aerogeophysics Antarctica Gravity theme English Coast Antarctica Slessor Glacier Antarctica Recovery Glacier Antarctica Bailey Ice Stream Antarctica place Geology theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/ otherRestrictions Further by downloading this data the user acknowledges that they agree with the NERC data policy (), and the following conditions: 1. To cite the data in any publication as follows: Becker, D., Jordan, T., Robinson, C., & Corr, H. (2021). Processed line aerogravity data from the FISS 2016 surveys covering the Filchner and Halley Ice Shelves, and the English Coast (western Palmer Land), West Antarctica (2016/2017) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/B3E51C6E-20FD-4E3A-BE47-0ED2EFCAA0AB 2. The user recognizes the limitations of data. Use of the data is at the users' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data. otherRestrictions None url url crossReference url url crossReference url url crossReference url url crossReference doi doi crossReference url url largerWorkCitation textTable eng utf8 geoscientificInformation -40.44 -24.27 -81.06 -79.2 2016-12-29 2017-01-21 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/plain bytes 19922944 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=b3e51c6e-20fd-4e3a-be47-0ed2efcaa0ab WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Gravity results for the 2016/2017 FISS campaign, taken from the iMAR iNAV-RQH1003 sensor (total: 24 flights). The IMU/GNSS-strapdown gravity data processing was done by David Becker, Physical and Satellite Geodesy, TU Darmstadt, with a processing software that was developed at this institute. The cross-over-residuals suggest a data precision (unlevelled) of approx. 1.7 mGal. No terrestrial gravity ties were available for this campaign, so the determination of the absolute gravity level was difficult: - For flights F06-F18, the absolute value was determined by a comparison against existing IceBridge gravity data (uncertainty of this levelling and the IceBridge gravity level itself is expected to be around 3 mGal). - For flights F19-F23 and F25-F29, the absolute value was determined just using the IMU measurements, assuming that the temperature-corrected residual accelerometer biases were the same during the campaign (error of this assumption: approx 3 mGal). The positions (lat/lon/height) refer to the centre of observations of the iMAR-RQH IMU (the intersection point of its three accelerometers). The flights are now grouped by survey area (Recover, Slessor, Bailey = FISS). NOTE there is no Support Force gravity as the sensor was not on-board. The columns are: 1: Line or flight number 2: Date (YYYY/MM/DD) 3: Time (HH:MM:SS) 4: Latitude in degrees 5: Longitude in degrees 6: Elevation - Ellipsoidal Height (WGS84) in metres 7: Free Air anomaly [mGal] - Gravity disturbance w.r.t. GRS80 normal gravity [mGal] Data collection: The data were collected using an iMAR strapdown gravity system. asNeeded completed